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Pub. No.:    WO/2005/124992    International Application No.:    PCT/JP2005/003898
Publication Date: 29.12.2005 International Filing Date: 07.03.2005
H03B 5/12 (2006.01), H03H 11/44 (2006.01), H03H 11/48 (2006.01)
Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA [JP/JP]; 7-3, Marunouchi 2-chome Chiyoda-ku, Tokyo 1008310 (JP) (For All Designated States Except US).
TSURU, Masaomi [JP/JP]; (JP) (For US Only).
KAWAKAMI, Kenji [JP/JP]; (JP) (For US Only).
TAJIMA, Kenichi [JP/JP]; (JP) (For US Only).
MIYAZAKI, Moriyasu [JP/JP]; (JP) (For US Only).
MIYAMOTO, Kazuhiro [JP/JP]; (JP) (For US Only).
NAKANE, Masafumi [JP/JP]; (JP) (For US Only)
Inventors: TSURU, Masaomi; (JP).
KAWAKAMI, Kenji; (JP).
TAJIMA, Kenichi; (JP).
MIYAZAKI, Moriyasu; (JP).
MIYAMOTO, Kazuhiro; (JP).
NAKANE, Masafumi; (JP)
Agent: TAZAWA, Hiroaki; 7F, Daito Bldg. 7-1, Kasumigaseki 3-chome Chiyoda-ku, Tokyo 1000013 (JP)
Priority Data:
PCT/JP2004/008957 18.06.2004 JP
(JA) 電圧制御発振器
Abstract: front page image
(EN)A negative capacitance circuit having impedance frequency characteristic which is inverse with respect to the normal capacitance is connected to a variable capacitance element changing capacitance according to a control voltage as a tuning circuit controlling the oscillation frequency. Thus, it is possible to increase the change ratio based on the control voltage of the combined capacitance including the variable capacitance element and the negative capacitance circuit and broaden the oscillation frequency band.
(FR)Un circuit à capacité négative comportant une caractéristique en fréquence d'impédance qui est inverse par rapport à une capacité normale, est relié à un élément à capacité variable qui modifie de capacité en fonction d'une tension de commande telle qu'un circuit d'accord commandant la fréquence d'oscillation. Ainsi, il est possible d'augmenter le rapport de modification sur la base de la tension de commande de la capacité combinée comprenant un élément à capacité variable et le circuit à capacité négative et d'élargir la bande de fréquences d'oscillation.
(JA) 発振周波数を制御する同調回路として、制御電圧に応じて容量が変化する可変容量素子に、通常の容量に対してインピーダンスの周波数特性が逆向きの特性を有する負性容量回路を接続することで、可変容量素子および負性容量回路からなる合成容量の制御電圧に応じた変化比を大きくし、発振周波数帯域を広帯域化するようにしたものである。
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)